DART

dart else if

void main() { 
   var num = 2; 
   if(num > 0) { 
      print("${num} is positive"); 
   } 
   else if(num < 0) { 
      print("${num} is negative"); 
   } else { 
      print("${num} is neither positive nor negative"); 
   } 
}  

flutter if else

it will work inside an widget.
Column(
  children: [ 
    if(a > 10)...[
      Text("A is greater than 10"),
    ]else...[
      Text("A is less than or Equal to 10")
    ]
])

Normally:
    int time = 6;
    if(time > 12) {
      time = time - 12;
      print('$time PM');
    }else {
      print('$time AM');
    };

dart if

void main() { 
   var  num=5; 
   if (num>0) { 
      print("number is positive"); 
   }    
}

if else dart example

void main() { 
   var num = 12; 
   if (num % 2==0) { 
      print("Even"); 
   } else { 
      print("Odd"); 
   } 
}